I got text from my brother-in-law to stop over, so I did. When I got there my sister wasn't there though. He tells me she wants to get breast implants and starts talking about big tits. Then he said my sister told him my tits weren't nice. This upsets me and out a rage I show him and let him feel my breasts. He's never titty fucked anyone before so I let him fuck my tits. After he cums between them, my sister calls me and says she's almost home. I want to get cleaned up but he wants to fuck them again. So I tell him to be quick but as soon as he cums on them again, she walks through the door.